The subject of this thesis is to create a system for automatic tracking and positioning for pets. Three applications have been designed for this purpose: a mobile application for sending location data, a background service for receiving and saving data, and a user application for displaying and editing data. In this paper, all three applications are described in detail with comments regarding the essential parts of the code, followed by instructions for starting and continuing the work on the system. In addition, battery measurements were performed and analysed on the actual mobile device. At the end, designed system is compared with some of the similar devices available on the market.